The purpose of this cluster randomized controlled trial is to study the effectiveness of reminders to support the sustainability of an affordable mobility innovation by healthcare aides in supportive living and long-term care facilities. Using a stratified 2x2 factorial design, we will determine which combination of frequency and intensity of reminders is required to sustain a mobility innovation, the sit-to-stand activity. Four research questions guide our study: 1) Do more frequent reminders (every month) improve the sustainability of the innovation by healthcare aides in supportive living and long-term care facilities compared with less frequent reminders (every 3 months)? 2) Do high-intensity reminders (paper-based reminders plus peer reminders) improve the sustainability of the innovation by healthcare aides in supportive living and long-term care facilities compared with low intensity reminders (paper-based reminders only)? 3) Do more frequent reminders plus high-intensity reminders synergistically improve the sustainability of the innovation by healthcare aides in supportive living and long-term care facilities? 4) What are the processes associated with the ongoing uptake of the innovation over a year of follow-up?